linux-kernel - Re: time warp on 2.6.18-rt6 (2nd try)

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Message-ID: <453CEBFB.9010409@redhat.com>
Date:	Mon, 23 Oct 2006 11:21:15 -0500
From:	Clark Williams <williams@...hat.com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	LKML <linux-kernel@...r.kernel.org>
Subject: Re: time warp on 2.6.18-rt6 (2nd try)

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Ingo Molnar wrote:
> * Clark Williams <williams@...hat.com> wrote:
> 
>> I'm still seeing the time warp ("It's just a jump to the left!" :))* 
>> being triggered on both my Athlon64x2 (32-bit kernel) and my Athlon64 
>> up box (64-bit kernel). [...]
> 
> that was most likely a false positive - every time settimeofday is done. 
> I've just uploaded -rt7, could you check it whether the time warp 
> messages are gone?
> 
> 	Ingo

I ran pi_stress on both the 32-bit kernel (Athlon64x2) and a 64-bit
kernel (Athlon64 up) and am still getting a time warp bug.

I'm rebuilding now with a bit more debug info turned on and I'm trying
to track down an Intel box that I can try this on to see if somehow I'm
exercising a code path that hasn't been touched much. Hopefully I'll be
able to test on a P3/P4 box this afternoon and can confirm or deny
whether this is AMD specific.

Clark

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